Air-pump



P. M. SCANLAN.

AIR PUMP.

APPLICATION FILED sEPT.Io,1919. IzfNzwED IAN.2I. 1921.

1,385,497. Patented July 26, 1921.

UNITED STATES 1 PATENT OFFICE.

. 'PATRICK M. SCANLAN, 0F BROOKLYN, NEW YORK.

'AIR-PUMP.

Specification of Letters Iiatent. Partgntgd t111137.26., 1921Application filed september 1o, 1919, serial No. 322,81?.A RenewedJanuary 27, 1921'. f seriai No. 44o 529 To all tlg/tom t may concern:

:Be 'it known that I, .Farmen M. SCANLAN, a citizen of vtheUnitedStates, and residing at: Brooklyn, in the countyl ofKings andState of New York, have invented certain new and useful. Improvements inAir- Pumps, of which the following is a specilication, such as willenable those skilled in the art' to which it appertains to make and usethe'same; l l

This invention relates to air pumps and particularly to devices of thisclass designed iioi' use in iniiating pneumatic tires, and the objectthereof `is to provide an air pump which is simple in construction,eicient in operation and which can be operated more conveniently oreasily than other devices of its class and with the exertion of aminimum cilort orV power; a further object being to provide a portablepump which involves foldably connected parts which may be com'- p'actlyfolded together whenk not in use; and with these and other objects inView the invention consists in an air pump constructed and operated ashereinafterV described and claimed. e p

The invention described and claimed herein is an improvement on thatdescribed 'and claimed in a prior` patent granted to me April 22, 1,919,and numbered 1,301,751; and is fully disclosed in the followingspecification, of which the accompanying drawing forms a part, in whichthe separate parts of my limprovement are designated by suitablereierence characters in each of the views, and in which Figure 1 is aside view of a pump and indicating the operation thereof, and with partof the construction rbroken-away and in section;

Fig. 1 is a view similar vto Fig. 1 but showing only a detail of theconstruction on an enlarged scale, and showing such detail in section; l

Fig. 2 is a partial section on the line 2 2 of Fig. 1; l

Fig. 3 is a partial section on the line 3 3 of Fig-2 and on an enlargedscale;

Fig. 4 is a partial section on the line 4 4 of Fig. 1 and on an enlargedscale; and,

Fig. 5 is a partial section on the line 5 5 of Fig. 1 and on an enlargedscale.

In practice, I provide a base 10 which is stamped from sheet metaland isapproxi-l pivotal connection` for a 'lever,15 with the` base 10. n Thelever 15' is also preferably stamped Irom sheet metal and is ofU-shaped' form, or. comprises parallel side members 16 Joined at one endby an integral cross head 17, andjthe free ends 180iwhich are vrotatablymounted on `the pin or bolt 14, asl clearly shown iii Fig.k 2. Atransversev plate 19 is secured or mounted between the side members 16of the lever 15 adjacent to the cross head 17, and which in` combinationwith said cross head forms a support for a detachable handle member 20,the inner end of which is provided'with la rod 21 which passes throughthe cross head 17, and is threaded into the transverse plate 19, asclearly shown inFig. l.

Pivoted to the base as shown' at 22 is a supplemental base member 23composed of two similarly formed strips 24 vjoined at their free ends'by .a cross rod 25. vA yokeshaped member v26 is l rotatably mounted onthe' rod 25 betweenthey sides 24 of the supplemental base member 23, andmounted in ronnection with lsaidI Yyokeshaped member is a cylinderframe' member' 27 in which a pumpcylinder 28 is mounted. A

Theframe member 27 isfstam'ped from sheet metal andv consists ofparallel side members 29 `joined at'the top by an integral cross head 30land to the base of which is secured a transverse plate 31 which joinsthe free ends of the' side members 27. The lever'l, or the side members16. thereof, are pivotallyy connected tothe side members 29' of the'iramefmeinber 27 vby bolts 32 passed'therethrough,l as clearly shown inFigs. 1 andp..kk i i A 'i Thecylind'er 28 isv closed at `its upper andlower ends by cap lplates'33andf34, and a tubular .piston .rodi 35 isadapted to pass 28, and mounted on said piston rod within the cylinderis a piston 36. The protruding` end of the piston rod passes .throughabushing construction which consists of an inner sleeve nut 37, to whichis'secured an outer sleeve nut 38, the latter sleeve nut beingadjustably mounted in the cross plate 31 of the frame member 28, thisconstruction be,- ing'clearly shown inFig. 1. The piston rod also passesthrough' the crossl'head39 of Y member 40, whereby arubber hose may beyconnected With andl placed in communicatioliwvth said coupling member40` in the usual manner. A

The' piston 36, in the form of construction shown, is made up of' aplurality of fibrous strips or disks 43, 44 and 45, the disks .43

and 45 being preferably composed of cork or felt,f\'vhile t e strip 44is preferably composed of leather, andthese strips or disks arey held inposition by a plurality of metal .l disks 46, which are mounted on theinner end portion of the tubular pistonrod and held in place by a nut 47secured to said rod. A valve device 48 is mounted in the inner endportion of the 'rod 35, said valve device being provided With a Vvalvemember 49, which is adaptedl to control -thepassage of air from thecylinder into and through Said tubular piston rod through ports orpassages 50 in said valve device.

A, catch ,andv lock device 51 is pivoted to the inner face of one 0f thesides 11 of the base 10, as shown in Figs. 2 and 3, said device beingprovided Withtwo nose portions 52, one of Which is adapted to operate inconnection vwith a pin 53 mounted on the free' end portion of one of thesides 24 of the supplemental base member 23, and the other of which isadapted to operate in connection with apin54 secured to the side 11 withwhich the-device '51 is connected. The catch and lock device 51 servesto-hold 'the supplemental base member 23 in the position shown in -fullv lines in Figs., 1 and 3, While the pump is in operation, but willpermit of the folding of said supplemental base member 23 into theposition shown in dotted lines in Fig. 3, in folding the separate partsof the pump together. A

V The distinctive features of this construction over that shown anddescribed in the patent hereinbefore referred to, are the supplementalbase member 23, the connection of the pump mechanism involving the frame27, cylinder 28 and vpiston rod 35 With the base 10. orsaid supplementalbasey and the connection of the lever 15 With the frame 27, whereby itWillgbe seen that a greater lever stroke is obtained at a greaterleverage thus roducinv a more owerful um mechab nisrn. By providing thesupplemental base member 23, the various parts of the pump involving thelever 15, the frame 27 and cylinder. 28 may be compactly folded togetheras is partially Vindicated in dottedlines in Fig. r1, as Well as in Fig.3, it being understood that the handle member 20 is detached from thelever 15 in this operation.`

It will also be apparent that While I have shown a specific formofApiston and valve device mounted in the inner end portion of the tubularpiston rod, that my invention is not limited to this construction, norto the various other details of constructionherein shown and described,and changes therein and modifications thereof may be made, Within thescope of theappended claims, Without departing from the spirit ofmyinvention or vsacrificing its advantages.

`It will also beseen that another distinctive feature ofthis inventionover that described in my lprior patent lies in the construction ofthebase 10 of a single strip of material bent into approximately U-shapedform, the free ends of which are joined by a pin or boltand the centralportion of which is reinforced b y a U-shaped strip 55, which isrivetedor otherwise secured to the sides 11 of the base 10, as isillustrated in Figs., 2 and 3. This openwork construction simplifies themanufacture of the base and also cheapens the cost thereof by reason ofthe saving of material as Will be apparent. It Will also be noted thatthe sides 11 arerecessed at the top asl shownat 56 to form a foot restin the use of the pump, it being un derstood that the operator placesone or both feet upon the .base 10 to hold it in vproper position, Whilethe lever 15 is operated by liand.

Having fully described my invention, what l claim as new and desire tosecure by Letters Patent, is

1. A device of the class described 'comprising a base, and an airpumpmechanism involving a pump cylinder, a piston in said cylinder and a rodconnected Withsaid pistonV and passing out through one end of saidcylinder, a supplemental base movably mounted. in saidbase, meansforpivota-lly connecting the protruding end of the piston rod in connectionywith said supplemental base, and an operating 'lever pivoted to thebase and pivotally connected With said pump mechanism. y

2. A device of the class described coinprising a base, a supplementalbase movably mounted therein, a pump mechanism involving` a pumpcylinder, a piston in said cylindei' and a rod connected withsaid-piston and passing out through one end of said cylinder and pivotedlto said supplemental base, a 'frame member in which said cylinder ismounted, and a lever pivoted to said base and pivotally connected Withsaid frame member.

. 3. A device of the class described comprising a base, asupplementalbase pivotally mounted in connection therewith, a pump `mechanisminvolving a cylinder, a piston in ber pivotally mounted in connectionwith said supplemental base and to which the protruding end of saidpiston rod is connected, a frame member in which said cylinder ismounted, a lever pivotally connected with said base and provided atitsfree end with a detachable handle member, and means for pivotallyconnecting said lever with said frame member below the central portionof the cylinder.

4. A device of the classv described comprising a base, a supplementalbase pivotally mounted in connection therewith, a pump mechanisminvolving a cylinder, a piston `in said cylinder, and a tubular rodconnected with said piston and passing out through one end of saidcylinder, a yoke-shaped member pivotally mounted in connection with saidsupplemental base and to which the protruding end of said piston rod isconnected, a frame member in which said cylinder is mounted, a leverpivotally connected with said base and provided at its free end with adetachable handle member, means for pivotally connecting said lever withsaid frame member below the central portion ot the cylinder, and acoupling member mounted in connection with said pivoted yoke-shapedmember and with which a iiexible hose is adapted to be connected.

5. A device of the class described comprising a base, a supplementalbase member pivotally mounted in connection with said base, means forlocking said supplemental base member in connection with said base inone position thereof, and means for pivotally connecting a pumpmechanism with said supplemental base member.

6. A device of the class described comprising a base, a supplementalbase member pivotally mounted in connection with said base, means forlocking said supplemental base member in connection with said base inone position thereof, means for pivotally connecting a pump mechanismwith said supplemental base member, said pump mechanism involving acylinder, a piston in said cylinder and a ltubular 'rod connected withsaid iston and assino out through one end C b of said cylinder, and alever pivoted to said base and in operative connection with saidcylinder.

7. lA pump device of the class described comprising a substantiallyU-shaped base, a supplemental base member pivotally mounted between thesides of said base adjacent to the cross head end thereof, a leverpivotally mounted in connection with the free ends ot' the sides of saidbase, a pump mechanism involving a cylinder, a piston and a rodconnected with said piston in passing` out throughv one end of saidcylinder, a frame member in which said cylinder is mounted, means forpiv'otally connecting said lever with said frame member, meansfor'pivotally connecting the protruding end of said rod with saidsupplemental base member, said supplemental base' memlber being adaptedto be moved into two positions within said baseV in folding the separateparts of the pump together and extending the same when in use, and acatch device for locking the supplemental base member in connection withsaid base when the parts of the pump are in operative position.

In testimony that I claim the foregoing as my invention I have signed myname in presence of the subscribing witnesses this 9th day of September,1919.

PATRICK M. SCANLAN.

Witnesses:

C. E. MULREANY, H. E. THOMPSON.

